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  #1  
Old Jan 28th, 13, 04:05 PM
Z28_302 Z28_302 is offline
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Brian
 
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Default K&N X Stream Air Cleaner Toppers?

Anyone using one of the K&N X Stream air cleaner toppers or assemblies? I'm looking for more power - anyone feel strongly one way or another?
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  #2  
Old Jan 28th, 13, 05:09 PM
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Default Re: K&N X Stream Air Cleaner Toppers?

Not a part I would be looking for more power from... Looks cool when the hood is up though.
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  #3  
Old Jan 28th, 13, 05:52 PM
dyno jonn dyno jonn is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Those give you less power, unless your lid is smashed down on the top of your carburetor. You'll look faster at the drive in though, and you'll be out some cash you could have used better elsewhere.
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  #4  
Old Jan 28th, 13, 06:11 PM
bilodeaulynn bilodeaulynn is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Not a big fan of K&N. Most of the air filter products do flow more air, but at the cost of less filtering.
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  #5  
Old Jan 28th, 13, 06:18 PM
Z28_302 Z28_302 is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

wow... why will it make less horsepower? Thought more flow was better as long as the fuel/air mixture was adjusted correctly.
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  #6  
Old Jan 28th, 13, 06:47 PM
bigblockragtop bigblockragtop is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Quote:
Originally Posted by Z28_302 View Post
wow... why will it make less horsepower? Thought more flow was better as long as the fuel/air mixture was adjusted correctly.
I wonder why also. I used the topper, I am not sure it helped(never did side by side comparison). I can not see how it would not help. I also think K&N does flow better than stock. I added a procharger and it came with a K&N...
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  #7  
Old Jan 29th, 13, 09:57 AM
Eric Kammerer Eric Kammerer is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Search for tests. One or more of the magazines did testing and the filter top made more power.

http://www.superchevy.com/technical/..._filter_tests/
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  #8  
Old Jan 29th, 13, 10:11 AM
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Default Re: K&N X Stream Air Cleaner Toppers?

Quote:
Originally Posted by Eric Kammerer View Post
Search for tests. One or more of the magazines did testing and the filter top made more power.

http://www.superchevy.com/technical/..._filter_tests/
But not enough to amount to a noticeable change in power on the street. Close the hood and that improvement might just go away because the hood is too close to the lid for it to be efficient. They said a 4" filter wouldn't allow the hood to close so they switched to a 3" filter... That's leaving less than an inch of clearance above the lid...
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  #9  
Old Jan 29th, 13, 10:55 AM
Fred Ficarra Fred Ficarra is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

I've one installed at this moment. It'll be comparison tested this season but that won't be until April. Also, it sits on a K&N 4" that's a replacement for a worn K&N. (Yep, a freebie from Summit) The entire assembly fits up and in my standard ducted hood.
OK, I admit it. It's there just to see if it works. I'll swap it out for the original during test and tune.
More thoughts; Air flow. It's not what it's cracked up to be. Example; A couple years ago after going too quick because of a new Lunati SR, I had to slow from an 11.30 ET. I had one chance to get it right or go to jail. So, what to do? Knowing about the 80-20 rule was the key. With engines as most everything else in our world, the rule says an engine will produce 80% of its maximum power at 20% throttle opening. So after backing off the throttle rod so that the plates were just seen to open, (mechanical linkage, non-progressive to the secondaries) I took a chance. Success! I slowed to 11.54. Just over the 11.50 cutoff for no roll bar. 20% = -3 tenths. Whew.
I might have a topper available this spring if anyone wants the 'look'.
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  #10  
Old Jan 29th, 13, 12:19 PM
Z28_302 Z28_302 is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

so if you were going to go with either the topper and a 4" filter or a 1" carb spacer, which would you go with the generate more low-end power?
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  #11  
Old Jan 29th, 13, 02:00 PM
Fred Ficarra Fred Ficarra is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

You just have to compare on a good dyno. All anyone can give you before hand are theory's. In either case you wouldn't notice much difference if any.
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One owner 69 Camaro,(yep, bought it new)
RS SS Hugger Orange, L88, 4:10's tru-tack posi, ducted hood, Endura, spoilers.
TH400 (CX) GV with Coan 8" converter, GV-OD, 8 track still on console and best et 10.495, 128.07mph 1.428 60'
All with 1960's stuff. (except tires and converter)
+ MT Super Scavenger headers & 3" full exhaust with X pipe.
1000cfm AED and HD Harold-Lunati SR, 725 lift with shaft rockers too.
http://epitomesrebuild.com/
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  #12  
Old Jan 29th, 13, 02:41 PM
bigblockragtop bigblockragtop is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Carb spacer would lower the low end torque. Like a tunnel ram better higher end power. Although if the spacer is a 4 hole it may help with low rpm, either way I do not think the difference would be drastic. The spacer if not made of metal can keep some of the heat off the carb and cool fuel equals better power. Have fun
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  #13  
Old Jan 29th, 13, 04:39 PM
chevysrule454 chevysrule454 is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Aparently they state that a flow through top changes the dynamic of a carb needing the air to flow across the top, not straight down.
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  #14  
Old Jan 29th, 13, 07:08 PM
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scblucam scblucam is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

You know this introduces a possible new issue. I began having fuel problems when they went to the 10% ethanol with the carb evaporating after a couple of weeks of not being started. Coincidently is was about the time I put on the X-stream.??? I'm changing to FI now but I wonder if the exposed top caused the evaporation. Either way hate the E10.
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  #15  
Old Jan 29th, 13, 07:50 PM
Eric Kammerer Eric Kammerer is offline
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Default Re: K&N X Stream Air Cleaner Toppers?

Any testing of any "minor" (or low buck, bolt-on, whatever you want to call it) engine modification such as a spacer of any type or height or something like this "extra" filter area done by any of the more reputable publications almost always explains, either in a table or chart or text, exactly how much tuning had to be done and how power/torque output was affected by a given modification.

I did not intend the link to Super Chevy testing the Xtreme lid to be anything remotely definitive... Just to illustrate what you can find with some simple googling.

You can't just throw some simple bolt on at an engine and see significant gains without tuning. Now in the case of something like a plastic spacer, maybe some gains can be seen just because of the spacer's insulation properties (increasing the density of the fuel/air charge, curing a "problem" the user did not know he or she had). But again, most all different bolt-ons get tested by reputable publications and/or websites, and information is out there to find and review.

I have an old drag racing buddy who was great at this. someone he knew would buy some new bolt-on like a carb, or lifters, or headers, just plop stuff on their car, and go slower. He'd buy the parts that didn't "work" cheap, and because he understood how to tune, he'd be out on the track soon after, and things worked.

So, as Dennis pointed out, just because somebody with a Chevelle saw some power gain with that Xtreme lid doesn't mean everybody will.

I personally would not run one. I don't like the look, and intuitively I feel that much filter area and letting air in from sides AND top would affect air velocity and fuel atomization. Clearly you could try to tune/change components to make it work. But...
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